Sebastian ziani de ferranti



No. 409,566. Patented Aug. 20, 1889.

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UNITED STATES PATENT OFEIcE.

SEBASTIAN ZIANI DE FERRANTI, OF HAMPSTEAD, COUNTY OF MIDDLESEX, ENGLAND.

DISTRIBUTION OF ELECTRICAL ENERGY.

SPECIFICATION forming part of Letters Patent 1\To. 409,566, dated August 2 0, 1889.

Application filed February 19, 1889. Serial No. 300,458. (No model.) Patented in England December 11, 1885, No. 15,251 in France December 9, 1886, No. 180,176 in Belgium Tanuary 8, 1887, No. 75,875, and in Italy March 81, 1887,11). 21,119.

5 Road, Hampstead, in the county of Middlesex,

England, have invented certain new and useful Improvements in the Distribution of Electrical Energy, (for part of which invent-ion I have received Letters Patent in Great Britain,

close within the outer conductor. Thus the high-tension main is at all points completely inclosed, and perfect safety is obtained.

Figure 1 of the drawings annexed is a longitudinal section of part of two concentric conductors insulated from one another. Fig. 2 is a diagram view of the system.

A is a dynamo; B, concentric conductors, one within the other, the inner one coupled to No.15,251,datedDecemberll,1885;in France, to one pole, the outer one to the frame of the No. 180,17 6, dated December 9, 1886; in Beldynamo, which forms the other pole. gium, No. 7 5,875, dated January 8, 1887, and C C are branches leading from the concenin Italy, No. 21,119, dated March 31, 1887,} of trio conductors to converters D D, which, as which the following is a specification. shown, are completely inclosed in a casing.

I 5 The object of my invention is to enable One end of the primary of each converter is towns or other places to be supplied with perfect safety with electrical energy from dvnamo-electric machines or generators at a dis tance from them. To effect this, I use at the generating-station an alternating-current d ynamo-electric machine wound to give a high electronnotive force-say ten thousand volts. The current I convey to the distant place or town by concentric conductors insulated coupled to the inner high-tension main, as at d, and the other to the casing, as at (1. One end of the secondary coil is also connected directly with the casing and the other to a wire 3, between which and the casing the lamps or translating devices are connected.

EE are lamp-circuits fed by the converters. F F are fuses in the branches to the converters, and G G are switches for switching 2 5 from one another, the inner conductor being current onto or off from the converters.

coupled to one pole of the dynamo and the hat I claim isouter conductor to the other pole of the dy- 1. The combination of a dynamo-electric manamo (preferably to the framing of the dychine, concentric conductors insulated from name, which is made to form the second one another leading therefrom, the inner con- 30 pole) and to earth. In this wayperfect safety duotor coupled to one terminal of the dynamo, So

is obtained, as the inner conductor is entirely incased within the outer one, and the outer one is always approximately of the same potential as the earth. It can therefore be handled with perfect safety. All parts of the framing of the dynamo can also, for the same reason, be safely handled. The revolving armature alone is of much higher potential than the earth, and consequently dangerous; but as the armature is not only revolving, but is also within the framing of the machine, no one could handle or come in contact with it. At the town or place where the current is to be used the tension of the current is reduced by converters to such an extent that it can be distributed with safety. The casing in which each converter is contained 1 make to form part of the outer conductor. The requisite fuses and switches on the branches the outer conductor to the other terminal and to earth.

2. The combination of a dynamo-electric machine, concentric conductors insulated from one another leading therefrom, the inner conductor coupled to one terminal of the dynamo, the outer conductor coupled to earth and to the frame of the dynamo, which forms the other terminal.

3. The combination of a dynamo-electric machine, concentric conductors insulated from one another leading therefrom, the inner conductor coupled to one terminal of the dynamo, the outer conductor to the other terminal and to earth, and a converter with one pole of its primary coupled to the inner conductor and the other pole to the outer conductor and to earth.

at. The combination of a dynamo-electric ma- 50 leading to the converters I also similarly inchine, concentric conductors insulated from one another leading therefrom, branch concentric conductors leading from the first conductors, switches and fuses on the inner hightension conductor of the branches inclosed in casings which form part of the outer conductor, and converters similarly inclosed and 'with their primary coupled at one end to the high-tension conductor and at the other to the casing.

SEBASTIAN ZIANI DE FERRANTI.

Witnesses:

GEO. J. B. FRANKLIN, HERBERT E. DALE,

7 Both of 17 Gracechurch Street, London, E. 0. 

